Furnace-front.



J. 150mm FURNiGE FRONT. APHZIUATIOH PILED,PEB.25, .1909.

Patented June 1,1909.

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) UNITED STATES PATENT @FEICE.

JAMES 'HOWDEN, OF GLASGOW, SCOTLAND, AssieNoR 'ro JAMES nownniv & COMPANY,

' LIMITED, or GLASGOW, SCOTLAND.

FURNACE-FRONT.

Specification of Letters Patent.

Patented June 1,1909.

Application filed February 25, 1909. Serial No. 479,948.

To all 'wiw'ra it may concern: I Be it known that 1, JAMES HoWDEN, a subject of the King of the United Kingdom of i Grreat Britain and Ireland, and residing at Glasgow, Scotland, have invented a certain new and useful Improvement in Furnace Fronts, of which the following is a specifica-. tron. i

' This invention relates to fronts of boiler and other furnaces of the kind arranged to work under forced draft and in which the furnace door is secured against opening, while g the furnace door locking ,the'airsupply valves are open,,by a locking lever pivoted on the furnace front and adapted" to stand in-fr-ont of the door, said lever serving to close the air supply. valves when withdrawn to permit of the urnace door being opened.

' Theobject of the (present invention is to provide an improve arrangement wherein the air suppl valves are arranged to rock on an axis ara el to the furnace front and are operate through gearing from the furnace door locking lever pivoted on the furnace front.

According to the invention, the spindle of lever has attached t0 itsinner end a toothed member, for in- 0 having a front elevation, Figs.

stance, a wheel having bevel teeth on part of its 'eriphery adapted to gear with a like toot ed member on a shaft carried in beardisposed parallel thereto, said shaft having attached 1 to it at each end a valve for controlling the supply of air to the furnace. n the accompanying drawings Figure 1 is 2 and 3 are vertical sections at right an les toeach other, and Fig. 4 is a horizonta section, of a'IIowdens forced draft furnace front fitted with the im rovements.

shown in the drawin s, the spindle A of the furnace door locking ever B, which in part is of bentor horn-like fori'nation, has attached to its inner end a wheel or segment bevel teeth on part of its periphery adapted to gear with a like wheel or segment D secured to a shaft E carried in bearings F and disposed parallel to the furnace front, the said shaft E having attached to it at each end a valve G for controlling the supply of air to the furnace.

WVhen the lever B is turned to withdraw the bent or horn-like arm I) from itsposition in front of the furnace door H, (see Fig. l), the wheel 0 receives a partial rotation and imparts movement to the wheel D, whereby the valves G are brou ht to their closed position, indicated by full lines at liigs. and the furnace door lican. then be opened without risk of flame entering the stokehole; but when the furnaccdoor H is closed and the arm brestored to locking position (indi cated by dotted lines at Fig. 1), the wheel D is turned in the reverse direction so that the valves G are brought to their open position, indicated by dotted lines at Figs; 2 and 3.

Having now described my invention what .and'3,

I claim and desire to secure by Letters Patent of the United States is'.- i g In forced draft installations, in' cornbination, a furnace front, a furnace door therefor, a lever having a spindle mounted on said furnace front, said lover adapted to be swung out of or'into position in front of the furnace door, a toothed member on the spindle of said lover, air supply vonduits in said furnace front, a shaft disposed parallel to the furnace front, a second toolliodnieinber on said shaft adapted to gear with the iirst rncntioned toothed member, and avalve at each end of said shaft for controlling the supply of air through the aforesaid conduits to the furnacc, as described.

In testimony whereof I have signed my name to this s 'iecification in the presence of two subscribing witnesses.

JAMES uoWDEN. 

